常规净水工艺中三氯硝基甲烷质量浓度分布调查

Concentration of Trichloronitromethane in Conventional Water Treatment Process

摘要:

对采用预氯化工艺的上海某水厂常规净水工艺出水中的典型含氮消毒副产物（NDBPs）三氯硝基甲烷（TCNM）进行了取样调查，研究了不同季节各工艺单元出水中TCNM的质量浓度分布，以及过滤工艺对TCNM的去除效果；同时也初步探讨了TCNM与溶解性有机氮（DON）和溶解性有机碳（DOC）之间的关系.研究表明，在该水厂的常规净水工艺中，普遍检测到TCNM的存在，其质量浓度随季节变化并不明显，与水中DON的质量浓度存在较密切的联系；此外，传统净水工艺中，过滤对三氯硝基甲烷有着良好的去除效果.

Abstract:

A sampling survey investigated the formation of a nitrogenous disinfection by product trichloronitromethane (TCNM) from pre chlorination, and the reduction of TCNM concentrations by subsequent conventional water treatment processes, i.e. coagulation, sedimentation, and filtration, with different seasons. The level of the measured TCNM had little change with the seasons, and were closely correlated with the dissolved organic nitrogen (DON), suggesting that DON plays an essential role in the formation of TCNM. The conventional treatment filtration had a certain effect on the reduction of TCNM.